Radiology News

Fibrous Cortical Defect Metacarpal

10yr old boy history of fall, shows cortical lucency of 3rd metacarpal

Teaching point by Dr MGK Murthy.

Both non-ossifying fibroma (fibroxanthomas) and fibrous cortical defects are composed of spindle shaped fibroblasts in a cartwheel pattern with scattered giant cells, foam cells and collegan along with abundend hemosiderin, cholestrol christals in the cytoplasm of fibroblasts.

Very common incidental radiographic lesion (caffey reported 36 % in population) in asymptomatic children with slight male predominance.

Usually present 4 to 8 years age, with peak incidence 10 to 15 years.

90 % occur in tubular long bones with commonest sites being, distal femoral, proximal and distal tibial and around the knee with upper extremity being an uncommon site. however cases are reported in the innominate bone, clavical, skull, scapula, mandible and small bones of hands and feet.

Typically metaphyseal and close to physeal plate.

The FCD arises within the cortex where as NOF arises eccentrically within the medullary cavity, with multiplicity being moe common with FCD.

Both arise from the posterior wall of the tubular bone and involvement of medial rather than lateral osseous surface is characteristic.

May involute and disappear or persist into adult life with epiphyseal location rare.

About Dr. Sumer Sethi

Number of Entries : 35

Unique blend of academic excellence and entrepreneurship, heading leading firms in India- Teleradiology Providers, pioneering company providing teleradiology services and DAMS (Delhi Academy of Medical Sciences) Premier test preparation institute in India for MD/MS/MCI preparation. He has also been an invited faculty member at various conferences, including Teleradiology in IRIA 2008 and 2011, Hospital Build Middle East, Congress of the Brain Tumor Radiology in Neuro-oncology Society. Dr. Sethi is Editor-in-Chief of Internet Journal of Radiology. He has a keen interest in Web 2.0 technologies and in maintaining his famous radiology blog, which has been featured in multiple international journals.